Refer to Item #3 on how to clean or remove hairs from burshes.
If unit still stops after you clean the hairs from middle and rubber brushes, then you can read brush motor current reading for us. See Item # 8 instruction.

If unit stops often with 3 blue lights blinking and Er02 shown on remote control unit when you presss "SET" button, then try to run unit with high speed to avoid Er02 error. Please make sure 2 roller brushes do not stuck by hairs. You can use scissor and dust brush to clean hairs. See photo below for illustration. If roller brushes are clean, please check does virtual block interfere with Hovo 510 movement. If Hovo 510 always stops near virtual wall, then turn off virtual wall or re-adjust its position. If unit has battery power but it stops after very short running time but there is no obvious error condition, please check rubber brush and main brush both end hairs jam condition. See photos below.

Power switch located on right hand sideshould be turned on in order to charge battery manually.

There are two ways to recharge battery, manual charging and Auto charging. Red light will be blinking during battery charging process. Red light becomes steady when battery is fully charged. Charging process will start when battery power level below 15.5V. Charging process will take about 3 hours to fully charge completely depleted battery.

If your unit encounter problem which has no clear solution, please remove battery and re-install it to reset system.
If your unit will not be used for longer period of time, you also need to remove battery before put unit on storage.

Use screw driver to remove two screws and open battery compartment. Then you can disconnect battery inside compartment.

Push both SPOT and CHARGE buttons then turn unit on. AUTO, SPOT and CHARGE blue lights will be all on. Lift unit off the ground with handle and push SPOT button three times, both wheels will start to rotate. Put unit upside down on floor to check two moving wheels, roller brushes and UV lamp condition.

When 3 blue LED lights flashing together with warning sound, that means unit encounter ERROR condition. You can view error code by pushing SET button on remote control. If it shows "Er02" error code, that means two roller brushes are very dirty and with hairs on both ends. You need to clean brushes and restart unit to continue cleaning. If there is no hair, then check bearing (on rubber cap) rotation is smoothly.